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United Nations Educational, Scientific and Cultural Organization ,  United Nations Environment Programme ,  [Proceedings of a Scientific Seminar: IPAL Technical Report Number A - 3] ,  Proceedings of a Scientific Seminar: IPAL Technical Report Number A - 3

United Nations Environment Programme ,  Food and Agriculture Organization of the United Nations ,  [The Ecological Management of Arid and Semi-Arid Rangelands in Africa and the Near and Middle East (EMASAR - Phase II) - Volume V: Grassland Education and Training] ,  The Ecological Management of Arid and Semi-Arid Rangelands in Africa and the Near and Middle East (EMASAR - Phase II) - Volume V: Grassland Education and Training